Loom-dobby.



H. LE DOUX.

LOOM BOBBY. APPLICATION FILED o'oT. 24,1907.

935,667. Patented 0013.5, 1909.

2 SHEETS-SHEET l.

@kalba/c0004: vvoem/bof H. LE DOUX.

LOOM BOBBY. APPLICATION .FILED UT. 24,1907.

935,667. Y Patented 0cm, 1909.

2 SHE TS-SHEET 2.

UNITE@ SITES ATEN HECTOR LE DOUX, OF WORCESTER, MASSACHUSETTS, ASSIGNORTO CROMPTON c KNOWLES LOOM WORKS, A CORPORATION OF MASSACHUSETTS.

LOOM-BOBBY.

Specification of Letters Patent.

Patented Oct. 5, 19M).

Application filed October 24, 1907. Serial No. 398,995.

To all whom it may concern:

Be it known that I, I-Inoron Ln DOUX, a citizen of the United States,residing at lVorcester, in the county of lVorcester and State ofMassachusetts, have invented certain new and useful Improvements inLoom- Dobbies, of which the following is a specification.

My invention relates to a loom dobby for operating the harnesses of aloom, and more particularly to a dobby for a loom having swivelshuttles, to obtain a figured e'ectin plain or fancy weaves, in additionto the ordinary y shuttle.

In looms of the class referred to, ordinarily termed swivel looms, thereare one or more rows of swivel shuttles operated by racks atpredetermined times, according to the indications of the pattern chain,to obtain a figured effect. In this class of looms, as ordinarily made,the harnesses are moved to form the shed for the swivel shuttles, andalso moved to form the shed for the Hy shuttle, and the swivel shuttlesare operated at one time, when the picking motion for the general flyshuttle has to be stopped, and the fly shuttle is operated at anothertime. For example, when the woven fabric has a series of continuousstripes made by the swivel shuttles, said shuttles are operated everyother pick, and the picking motion for the fly shuttle has to be stoppedevery other pick, so that the amount of the fabric produced is only halfas much as it would be, according to the speed of the loom, as if therewere a simultaneous operation of the swivel shuttles, and of the flyshuttle.

The object of my invention is upon the `construction of a dobby of theclass referred to.

In my improvements I form simultaneously a double shed, a lower andlarger shed for the liy shuttle, and an upper and smaller shed for theswivel shuttles when the swivel shuttles are to be operated. The swivelshuttle rail may be attached to the hand-rail of the lay in any suitableor usual way, and when the swivel shuttles are-operated, they carry thefilling through the upper shed, and the fly shuttle carriesthe fillingthrough the lower shed, simultaneously, and thus the to improve wovenfabric will be produced without losing a pick.

In my improvements, in order to obtain a double shed when desired, Iprovide each upper hook and each lower hook operated by the two lifterbars, with two notches, making a double hook. I also provide some of thepattern chain bars with pegs of diifercnt lengths. lVhen the patternchain bar has no peg, the pattern indicator linger will raise a dobbyhook, and there will be no movement of the harness jacks, thus leaving acertain amount of the warp threads in the lower plane of the shed, asusual, and when a short peg comes under the pattern indicater finger,the outer notch or hook on a dobby hook will be engaged by a lifter bar,and the warp threads moved to the middle position, thus forming theupper part of the shed for the fly shuttle, as well as the lower part ofthe shed for the swivel shuttles, and when a long peg on the patternchain bar comes under a pattern finger, the dobby hook will drop down,and the lifter bar will engage the inner hook of the double hook, andmove the warp threads up to their highest position, to form the upperpart of the shed for the swivel shuttles.

In my improvements, I preferably use a mutilated gear drive, instead ofa crank drive, for the dobby rocking lever of the lifter bars, to obtaina quick motion in the shed opening, and also a long dwell for the shed,to give time for the movement of the swivel shuttles.

I have shown in the drawings a detached portion vof a loom dobby with myi1nprovements combined therewith, sufficient to enable those skilled int-he art to understand the construction and operation thereof.

Referring to the drawings F igure l is a side view of a dobby, and aportion of a loom side, with my improvements combined therewith.` Fig. 2shows the mutilated gear drive shown in Fig. l, detached, and as asection on line 2, 2, Fig. l, looking in the direction of arrow a, samefigure. Fig. 3 shows the inner part of the dobby, detached, with thejacks and hooks forming a double shed. F ig. l corresponds to Fig. 3,but shows a different position of some of the parts for 'y only, for thefly shuttle. Fig. 5 shows the position of a' double hook, when loweredthrough a long peg on the pattern chain. Fig. 6 shows the position of adouble hook when lowered through short peg, and, Fig. 7 shows theposition of a. double hook when there is no peg on the pattern chain.

In the accompanying drawings, 1 is a detached portion of a loom frame, 2is the dobby stand, 3 are the harness levers or jacks, pivotally mountedon a transverse rod t, each jack 3 carrying a hook lever 5, pivotallymounted thereon, to the upper end of which is pivotally attached theupper hook 6, and to the lower end of which is pivotally attached thelower hook 7. Each hook 6 and 7, has on one end, on one side or edge twonotches forming two hook portions 6 and 6,y and 7 and 7, respectively.

8 is the upper lifter bar, which has a reciprocating movement in ahorizontal opening 2 inl the frame 2 of the dobby, and is connected ateach end by a link 9 with the dobby rocking level' 10, centrally mountedon a shaft 11. The lower lifter bar 12 has a reciprocating movement inan elongated slot 2 in the frame 2, and is connected by a link 13 to thelower end of the lever 10.

111 is a pattern cylinder, carrying the pattern chain, made up of lbars15, in this instance carrying long pegs 15, 'and short pegs 15 on thesame bar, and also short pegs 15 on another bar. Extending over thepattern cylinder 14rare the pattern indicator lingers 16, some of whichhave straight inner ends, on which rest the upright wire 17, to raise orlower the upper hooks 6, and the others having the upturned inner ends16, to engage and raise the lower hooks 7. The pattern chain cylinder 14has a rotary movement communicated thereto through a worm lgear 18meshing with and driven by a worm 19 fasten a shaft 20. The shaft 20lcarries a bevel pinion 21, which meshes with the bevel pinion 22 on theupright shaft 23. The lower lend of the upright shaft 2B has a Ybevelpinion 241 thereon, which meshes with ay bevel pinion 25 on a drivenshaft 26.

All lof the above mentioned parts, except the double hooks 6, and 7, maybe of the usual and well known construction.

The lever 10 has an arm 10', and an elongated opening 10 therethrough,in which is adjustably secured the upper end of a rod 27. rlhe lower endof the rod 27 is mounted on a crank stud 27 on a gear 28 which ismounted on a stud 29 and carries a plate 30, which Ahas concaved ends totravel on an annular fiange 31 on a mutilated gear 31, to form a-dwellgear drive for the dobby rocking lever 10. rIhe mutilated gear 31 isfast on the driven shaft 26.

rIhe operation of my improvements, from the above description inconnection with the drawings, will be readily understood by thoseskilled in the art. In the revolution of the pattern cylinder 14, if apattern chai-n bar 15 has no peg thereon, a pattern indicator finger 16will drop down at its weighted end,- and raise a double yhook 6, or 7out of engagement with the lifter bars S and 12, as shown in Fig. 7 so'that there will be no movement of they harness jacks 3, leaving acertain amount of warp threads in the lower plane of the shed, as usual.IVhen a short peg 15 comes under a pattern indicator finger 16, theouter hook, of a hook 6, or 7, will be engaged by the lifter bar, asshown by broken lines in Fig. 6, and the harness jacks 3 will beoperated to move the warp threadsto the middle position, thus formingthe upper part of the shed for the 'iiy shuttle, as well as the lowerpart of the shed for the swivel shuttles. Then a long peg 15 comes undera pattern indicator finger 16, a hook 6, or 7 will move down, as shownin Fig. 5, so that the inner hook will be engaged by the lifter bar, andmove the harness jacks 3 to cause the warp threads to be moved 'to thehighest position, to form the upper part of the shed for the swivelshuttles. In this way, the two sheds, a lower shed for the fly shuttle,and an upper shed for the swivel shuttles, are formed simultaneouslywhen desired, and both the swivel shuttles and the fly shuttle will beoperated simultaneously, and there is no stopping of the picking motion.By means of the mutilated gear drive for the dobby operating lever 10, Iobtain a quick motion in the shed opening, and also obtain a long dwellfor the shed, to give time for the passage of the shuttles.

It will be understood that the details of construction of myimprovements may be varied if desired.

Having thus described my invention, what I claim as new and desire tosecure by Let- -ters Patent is 1. In a loom dobby, a pattern chain,pattern indicator fingers, connectionsbetween said indicator fingers andthe hooks operated by the lifter bars, and said hooks, having twonotches 'thereon forming a double hook for cooperation with a singlelifter bar, the hook levers pivotally mounted on the harness jaeks, andsaid harness jacks, and lifter bars, and means for operating said lifterbars.

2. In a loom dobby, a pattern chain made up of bars having pegs thereonof two different lengths, pattern indicator fingers, connections betweensaid indicator fingers and the hooks operated by the lifter bars, andsaid hooks, having two notches thereon forming a double hook foreoperation with a single lifter-bar, the hook levers pivotally mutilatedgear, meshing with a gear, and lo said gear, carrying a dwell plate, anda crank pin, and connections from said crank pin to said operatinglever.

H. LE DOUX.

Witnesses:

JOHN B. SYME, JOHN C. DEWEY.

